diff --git a/devel/py-simpy/Makefile b/devel/py-simpy/Makefile
index ce4ab3d0268a..115f30b4b8d9 100644
--- a/devel/py-simpy/Makefile
+++ b/devel/py-simpy/Makefile
@@ -1,31 +1,31 @@
 PORTNAME=	simpy
-PORTVERSION=	3.0.13
-PORTREVISION=	1
+PORTVERSION=	4.1.2
 CATEGORIES=	devel python
 MASTER_SITES=	PYPI
 PKGNAMEPREFIX=	${PYTHON_PKGNAMEPREFIX}
 
 MAINTAINER=	wen@FreeBSD.org
 COMMENT=	Simulation in Python
 WWW=		https://simpy.readthedocs.org/en/latest/
 
 LICENSE=	LGPL21
 
-BUILD_DEPENDS=	${PYTHON_PKGNAMEPREFIX}setuptools-scm>0:devel/py-setuptools-scm@${PY_FLAVOR}
+BUILD_DEPENDS=	${PYTHON_PKGNAMEPREFIX}setuptools-scm>0:devel/py-setuptools-scm@${PY_FLAVOR} \
+		${PYTHON_PKGNAMEPREFIX}wheel>0:devel/py-wheel@${PY_FLAVOR}
 
 NO_ARCH=	yes
 USES=		python
-USE_PYTHON=	autoplist distutils
+USE_PYTHON=	autoplist pep517
 
 OPTIONS_DEFINE=	TKINTER DOCS
 TKINTER_DESC=	py-tkinter for plot
 
 PORTDOCS=	*
 
 TKINTER_RUN_DEPENDS=	${PYTHON_PKGNAMEPREFIX}tkinter>0:x11-toolkits/py-tkinter@${PY_FLAVOR}
 
 post-install-DOCS-on:
 	@${MKDIR} ${STAGEDIR}${DOCSDIR}
 	(cd ${WRKSRC}/docs && ${COPYTREE_SHARE} . ${STAGEDIR}${DOCSDIR})
 
 .include <bsd.port.mk>
diff --git a/devel/py-simpy/distinfo b/devel/py-simpy/distinfo
index 46810573818a..0396875ced13 100644
--- a/devel/py-simpy/distinfo
+++ b/devel/py-simpy/distinfo
@@ -1,3 +1,3 @@
-TIMESTAMP = 1586757021
-SHA256 (simpy-3.0.13.tar.gz) = dd8c16ca3cff1574c99fe9f5ea4019c631c327f2bdc842e8b1a5c55f5e3e9d27
-SIZE (simpy-3.0.13.tar.gz) = 410773
+TIMESTAMP = 1779744109
+SHA256 (simpy-4.1.2.tar.gz) = 76ef36b71e0436ba94e55febc001c78879e493a323f045bbcfbb0b216e9b1fbc
+SIZE (simpy-4.1.2.tar.gz) = 410129
diff --git a/devel/py-simpy/files/patch-pyproject.toml b/devel/py-simpy/files/patch-pyproject.toml
new file mode 100644
index 000000000000..3587570c5d4d
--- /dev/null
+++ b/devel/py-simpy/files/patch-pyproject.toml
@@ -0,0 +1,10 @@
+--- pyproject.toml.orig	2026-05-25 21:26:34 UTC
++++ pyproject.toml
+@@ -1,6 +1,6 @@ requires = [
+ [build-system]
+ requires = [
+-    "setuptools>=64",
++    "setuptools>=63",
+     "setuptools_scm[toml]>=8.0",
+ ]
+ build-backend = "setuptools.build_meta"